Fish problem need help

[Tropical Buff]

So i am having tank issues with corals im my tank but i thought it was isolated to just corals. Last night I noticed a brown spot at the base of the fins on my yellow tang this morning i noticed the fins are deteriorating any suggestions???

[ReefTech]

Has anyone been picking at the tang? In my experience with tangs, fins like that usually comes from something stressing it out but every fish is different. Have you tested your water lately?

[ReefTech]

Has far as the brown spot goes I'm not sure. I've never seen a spot like that on a fish before. Maybe some sort of fungus or bacterial infection???

[dputt88]

it could be velvet...Oodinium pilularis... lets hope not though

[MizTanks]

Awe poor lil guy :-( Hope you can save him.

[Sir Patrick]

I have never experienced anything like this.

I can make a call or 2 tomorow, and see what can be figured out. Hope its not too late for your tang, or your other fish.

[slapshot]

The brown spot is blood. Either someone is beating him up or he has a bad bacterial infection. If you don't see someone attacking him then he needs treatment in a treatment tank with heavy antibiotics.

[binford4000]

The brown spot is blood. Either someone is beating him up or he has a bad bacterial infection. If you don't see someone attacking him then he needs treatment in a treatment tank with heavy antibiotics.

++1. It would be best for the tang and your other fish to get him out and set up a hospital tank with copper in it. Looks like fin rot to me

[Tropical Buff]

Here is a little more info he one of my oldest fish no new inhabitants in several months. I have never seen him picked on by the other fish. He acts totally normal and still has a good appetite.

did full water tests last week slightly high on phosphates= .16 and nitrates 10 will test again today but losing several corals as well not sure if it correlates or not.

Several weeks ago I did a treatment with Cheamiclean but have done 2 water changes of over 20% since

[Tropical Buff]

so as crazy as this sounds he is still swimming and has never lost his appetite. what are the chances of the fins growing back in fully??